Filter



June 4, 1929. TACKABERRY' 1,715,435

FILTER Filed Sept. 30, 1925 Sheets-She t 1 June 4, 1929. TACKABERRY 1,715,435

FILTER Filed Sept. 30, 1925 2 SheetsShee t 2 YQM/VWGJQ.

fumes Sr Patented Jam-:4, 1929.

ROBERT DANIEL TAOKA ERRY, 01F nnwrs roiv, mama FILTER;

-- .App1ication filed September-'30, 1925. Seria1 No. 59,561.

I This invention relates to filtering apparae tus, and is intended to'improve the construction of such filters andIprovide simple and efiicient means for permitting the rapid andv efi'ective filtering'of large volumeso-f water or other liquid, andfto provide convenient and efficient means for thoroughly washing out the filtering strainers and sand hed,.,afteran accumulation of foreign particles'sepa 10 rated from i the liquid I that has passed through. v a

An, important feature ofthe present invention resides in the provision of a perfo-. rated or foraminous battle-plate arrangedto receive the inflowinglrawz liquid from the v supply nozzleand breakit'. into spray and distribute it' over the interior of the] tank,

without unduly agitatingthe body ofliquid 7 Within the tank or stirring up the bed of p v sand through which the filtering takes place.

Another feature-of the inventionconsists in the provision of means for effectively removing the accumulated foreign matter bya washing operation, accompanied by the stirring or agitating of the liquid in-l such a wayas'to promote the escape of the foreign particles with the Wash. liquid. The'invention also includes an improved construction of strainer or filter box which prevents the" escape of the particles of sand, while allowing the effective see'ping vthrough ofthe 7 filtered liquid. .These and otherfeatures of the invention will be vparticularly describedv inthe following spe'cificationand will be 5 defined inthe claims hereto'annexedQ; f

filtering appliances, from time to time, "to

' get rid of the accumulated foreign matter. Figure 2 is a vertical view, partly in elevation and partly in section,lot the apparatus shown in Figure 1' showing the ar-;

' rangement of the sand bed agitating device and filtering strainers Within the tank.

Figure 3 is a cross sectional view through tlleupper portion of the tank, showinga front elevation of the foraminous bathe plate and the driving mechanism for agitating the brake, theplane ofsaid view being indicated by arrows ma1 on Figure 1.,

I mates-.-

Figures is a vertical sectionon the plane 'g y' of; Figure l,.showing thewash liquid outlet and the skimmer mechanism.

central sections and rear elevations of the supply nozzle which delivers against the battle plate. I. F igures? and 8 are detail .viewsshowing, invertical'elevation and horizontal section, the construction. of filtering'strainers.

vations, respectively, of the reversible scoop Figures 5 and 6 are respectivelyvertical p 6O 7 the raw llquid v y or elbow, fo guiding the wash liquid into the overflow pipe. .7 1.

Figures 11, 12 and 13 are detail views of the deflecting plates shown, respectively, in plan and in ,elevational views at to each other.

right angles In the practice of this invention, accord 'ing to the form; illustrated in 'the drawings,

I employ? a tank, in this.case, of cylindrical form, as shown at. 1, provided "with an over head bridge rail or support 2, forcarrying certain parts which extend diametrically acrossithe-tank. I A central shaft 3' actsas-asupport for the agitating rake and the .centrifugallpaddle during thewashing [operationi The-rake 'comp'risesa channel-bar 4E,fmounted 'toexi f I tank and provided'with downwardlyyprotend diametrically acrossthe insides of the j'ecting teeth l, which, when the. rake ,is a I revolvedby the overhead driving; means, acts tOStlIllP-tllfi sand and agitateithewashr ing liquid ,whichis introduced from the hottom,. as will; be hereinafter"explained.' At

its upper en'dqthe, central shaft 3. carries a I worm gear 8 ofrelatively large" diameter, which is dr ven by an ntermeshingworm 9 on the-horizontal drive shaft 9, which can be driven in either direction by cross belt,- pulleys 10, alternately-throwninto action by means of a reversingclutch, of any suitable type, conventionallyillustrated in the draw- 1n middle axisand the outer end, is mounted a baffle plate or spraying element fi, compris ing as shown, a'foraminous or closely perforated back-wall '5 suitably curved'or inraw liquidtobe treated is: delivered into the tank, is coupled, into anozzle 11, whichis T esupply pipe 11, 'through which the 65 Figures 9 and 10 areplan views and :ele-,-

, 10' On; the rake-bar 4, intermediate of'the 10 5 .clined toreceive the liquid,'and having side zwlngs- 5%, similarly perforated.

. set into the sidewall of the tank at a suit 7 able 1, elevation. This nozzle is of peculiar formation-and embraces a body portion in theform of anannular flange 11, with a forwardly projecting downwardly curved over hanging hood member 11 ,"and' a rearwardly" extending underneath trough member 11?,

the trough and the hood projecting on opposite sides of the central flange or'body and, therefore, being in offset planes but having their inner curved" surfaces somewhat converging so. as to imparta definite direction to the inflowing columnrof liquid in order that it maybe directed wholly against the baffle plate 51 which, with its numerous perforations, acts to break the column of inflowing liquid into a spray of such fine streamsv'that it will not stirrup the sand or sensiblyagitate the body of liquid in the tank, as additional supplies of theliquid fl'owiin. Hence, the infiowing liquid is dis- 7 tributedover theinterior of the tank withoutan undue 'agi'tationor stirring up of the sand-bed. 7 l The tank is provided, near its bottom,

with afalse bottom above which are lo-' *cated' "an'ly desired number of filtering strainers 12, so constructed as to permit the water that seeps through the sand-filter hedtoescape into the off-takepipe 18, while preventing any sand from being carried along with the filt'ered water.

J These filtering strainers are of very simple construction, As'sho-wn in Figures 7 and 8, they comprise an outer cylindrical member 12, having closed top p'late'13, with projecting flanges or ears18, perforated to receive tie-bolts 17 The innermember 7 comprises a cylindricalswall' 16 and a funneled shaped bottoml; terminating in a discharge nipple 15, for connection with the oiftake pipe 18. The inner member telescopes inside of the-outer member, and at its top and bottom peripheral portionswis formed with slightly I enlargedfiflanges 16 fitting closely insidefltheouter member so a'stoleave a'wvery slight annular space between these flanges and between the outside of the cylindrical wall 16and the inside of the cylindrical wall 1250f the respective "members; The outer member isprovided at intervals around its periphery withdongi "'tudinal slots 12 and the inner member is provided with similar slots; 16, the parts be ing assembled so that the slots-of the two members, as shown in Figure 8, stand in staggered relation." Liquid'seeping down I "through the bed of sand surrounding and covering these strainers will enterthe slots 12 ofithe outer member and find its :way

through anarrow arcuate passage to the'adP' jacentslots 16 in the inner member, the intervening space or passage being so narrowas to preclude the-entrance of the particles ,ofsand. The liquid that has thus passed through the two slotted walls has been com-f pletely filtered and will escape through the 'outletorifice in the bottom of the strainer into the ofltake pipe 18, any 7 number of which maybe provided to accommodate any desired'number of filteringstraine'rs in the tank.

After the accumulation of foreign matter retained by the filtering bed of sand, it be 3 comes necessary to get rid of thisby a washng process, lnwhich case'washing'liquid is turned onin the reverse direction: through.

its full effect. 7 The foreign particles, having thus been washed outof the sand, arecarried off through an overflow pipe 20,-arranged at the top of the tank above the level of the supply pipe and nozzle 11; p

To drive thesuspended particles in the vide. apaddle iO =whos'e hub is mounted on a wash water toward the overflow pipe, I pro- I sleeve or bushing 41 on the-central shaft- 3,

said -v-hub 'carrying' a drivingk-sheave .42,

around which passes a driving chain which then runs over the quarter-turn outlet pulley I ,or sheave-43, which is driven by aclutch' pulley-indicated at 4:6. The bearing'boxes 47, which'carry the drive shaft45, are adjustable on vertical standards 1 to take a, up slack in the belt or-driving cabls io To get ridof complications in locating the baffle or spray plate beside the supply nozzle, without interfering with the action of the agitating devices, I have mounted the baflle- 7 plate direct-lyupon the revolubl'eg-rake. In i l i consequence of this arrangement, ineans are prov ded for ind cat ngthecorrect'pos ltlon H of the rake to properly position the battle plate with relation. to the supplywno'zzlep This'indicating'means comprises an upstanding rod or pointer, 6, on one end of thechanv Iiel bar, comprisingv the backbone of the rake, and a fixed polnter or arrow7, secured to-the' side-wall of the tank 1, directly over the -nozzle; It will be observed in this iconnec 'tion that a worm and gear drive provided for drlving the rake-shaft so that the rake- ;shaft, when once set to. proper position by reference to the indicating means or po nters,

will be held by the stationary worm at'rest so as 'to prevent accidental displacement from correct spraying position;

In orderto deflector guide the revolving agitated body of Wash liquid into the over flow pipe, I provide an elbow-shaped scoop I: '21, m'ounted on a verticalaxis so disposedas to allow, either end of the scoop to spring against the-side of the tank,leavii1g;the

7 other end projecting outward, according to let scoop to proper position to deflect the? I I structed to telescope inside the first shell to leave 1 an intervening space too narrow to the direction of revolution of the liquid body within the tank. This maybe manipulated by a hand wheel 22, on the top axle, as shown in Figure 10, but I prefer also to provide an intermediate vane 23 which will be acted.

upon by the swirling liquid to shift the outliquid into the overflow pipe.

In order to guide the particles thatars.

suspended in the liquid into the scoop, I provide,.on each side of the scoop, in the po sition shown in Figure 1, guide-plates 25. These guide plates comprise an inclined plane 25* with itshigher edge adjacent to the scoop but somewhat below the levelof. the scoop, and having an exterior flange or wing 25 for pulling against the inside wall of the tank.

To guide any scum oroil that floats on top of the wash liquid to the outlet, I provide a vertically adjustable skimmer, as shown in Figure 4:. This comprlses a dependingplate 30 mounted on the angle-bar 31-, extending from the outer bar inwardly of the tank at an angle of its periphery and adjustably supported by a pair of vertical screw rods 32, carried by'suitable bearing brackets. The two screw rods 32 are interand one of them is provided with a hand,-

- wheel 34:, by turning which both screws are simultaneously rotated and adjusted vertically so as to set and retain the skimmer plate 30 at a proper level to deflect particles outwardly where they will pass into the overflow scoop and out of the tank.

The strainers provide a simple construction of large capacity that are easily cleaned.

They may be made of any'siz-e and capacity.

and when made very large are provided with a top perforated ear or lug 13, into which the hoisting chain may be hooked to lift. them out of the tank when they can be quickly disassembled, cleaned and replaced.

. By the use of the overflow scoop and the cooperating guides for deflecting fore gn pari I walls for each of said shells one of which is ticles upward into the scoop, as well asthe use of theskimmer and of the rotarypaddle, which imparts, a centrifugal tendency to the body of liquid, the washing operation can be performed very quickly and expeditiously, and therefore these become very important factors in increasing the efficiency and capacity of the filter.

What I claim is: t l. A strainer element for a granular bed filter embracing an outer longitudinally slotted annular shell, an inner longitudinally slotted shell of similar contour, annular spacing shoulders forming intervening arcuate passages between the two shells, end

provided with anoutlet passageto allow the the outlet port;

.escape of liquid penetrating to theiinterior through'the slots in the shells, the respective slots being circumferentially oflset in rela- 1 tion to one another.

2. A' filtering strainer embracing in 'its construction a cylindrical shell closed at one. end and having a series of spaced slots in 1 itsside wall, a similarly slotted shell con-Y admit filtering sand, an end head in each shell forming respectively the top and bottom of the strainer, fastening means for se 1 curing the two shells together jwiththeir slots in staggered relation, the, end head of 3. A strainer for a filter bed of sand orthe i theinner shell having an outlet orifice.

like embracing in its construction two tele-v scoplc cup-like members arranged 1n 1nverted relation,"v one inside the other, the

lower having a discharge port in its bottom,

theother having its inverted bottom imperforate, the side walls of eachbeing slightly spaced apart to exclude, sand While permitting the flow of liquid therethrouglnjeach V cup-like member being provided with lateral ports in circumferentially staggered relation to those of the other.

4:; A Strainer for a filter bedof sand or the-"like embracing upper and lower cup-likemembers having telescoping sidewalls separated by an annular space dimensioned to permit flow. of'liquid therethrough, but exeluding sand grains, the upper member being closed at ,its upper end,[the lower memher being closed by a bottom head provided with a discharge port connectedwith an underneath pipe, each member havinga series Series of ports must fiow through a portion of the narrow annular space before enteringv thefports of the inner member on its way to V 7 v5. A strainer fora, filter bed of or each' annular wall-being provided with a series of vertic al Slots in circumferentially staggered relation to those of the other shell whenthe two shellsare telescoped together, means for spacing the inner shell from the outer shell to leave a narrow annular passage for the flow of liquid :whileexcluding sand, means for tying the two end headsdetach the like embracing in its construction two annularshells, each provided (with an inte-f gral' end head projecting laterally beyondthe annular walls of the respective shells," I

ably together, the lower end head being pro vided with an outlet port for connection with thegdischarge pipe- ROBERT DANIEL TnoK B n Yj I 2 In witness whereof, I'havesubscribedthe above specification. 

